Originally Posted by Mr Idiot Box
If it's the same bore size their wont be a difference.
efficiency comes with bore, control bore, surface finish, porting, and length of the barrel. Some will even argue that the material used in the barrel will also factor in with efficiency ie brass, or stainless steel. Not that we're talking about much air saved, maybe half a pod on a full fill...
I haven't tested the Disruptive barrels yet, I'm curious to see how they do though. Especially, against Shaft4 or CSL kit